1. Department of Urology, Leiden University Medical Centre, Leiden, The Netherlands.
2. Department of Medical Decision Making, Leiden University Medical Centre, Leiden, The Netherlands.
3. Dutch AYA “Young and Cancer” Platform, Utrecht, The Netherlands.
4. Department of Psychosocial Research and Epidemiology, Netherlands Cancer Institute—Antoni van Leeuwenhoek Hospital, The Netherlands.
5. Division of Clinical Studies, Institute of Cancer Research, London, United Kingdom.
6. Department of Medical Statistics, Leiden University Medical Centre, Leiden, The Netherlands.